Tuesday primaries: three stories to watch

As the days get shorter the political season is heating up. Primaries Tuesday will affect some of the most interesting races of the year, from Florida’s high-profile Senate contest to Arizona Sen. John McCain’s bid to survive a challenge from the right. Here's what to look for:

Tuesday is the day the Empire – oops, the establishment – might get a measure of revenge.

If polls are any guide, Senator McCain may survive the insurgent candidacy of former Rep. J.D. Hayworth. Early on, McCain’s relative moderation on illegal immigration looked like it might doom him in a state where that has become a huge issue, but the former GOP presidential candidate has himself tacked right and remains the favorite.